Evan Stone, a former teacher and founder of a teachers advocacy group called Educators4Excellence, said he was disappointed in what he saw as a lack of leadership on both sides.

WSJ: Teacher Evaluation Deal Falls Apart

It is not clear whether Alwaleed would be buying shares from Twitter cofounders Evan Williams or Biz Stone.

FORBES: Saudi Billionaire Alwaleed Reportedly Interested In Twitter Stake

Goldman previously worked with Twitter co-founders Evan Williams and Biz Stone on Blogger, before the company was bought by Google.

FORBES: Twitter VP of Product Jason Goldman Flies The Coop